Electric-arc lamp.



Patented l uly l6, I901.

J. H. HALLBERG.

ELECTRIC ARC LAMP;

(Application filed Nov. 13, 1900.)

(No Mudel.)

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NITED STATES PATENT ()Fmn.

'JOSEF IIENRIK HALLBERG, OF NEW YORK, N. Y., ASSIGNOR TO GENERAL INCANDESCENT ARC LIGHT COMPANY, OF SAME PLACE.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part Of Letters Patent No. 678,482, dated July 16, 1901. Application filed November 13,1900. Serial No. 86,321. (No model.)

To wZZ whom it may concern; Be it known that I, Josnr HENRIK HALL- BERG, a citizen of the United States, residing at New York city, county and State of New My invention relates to electric-arc lamps of the type known as alternating inclosed- 1'0 arc lamps, and it consists in various details of construction, which will be described in the specification and specified in the claims.

The object of my invention is to simplify and improve the construction of such lamps i and decrease their cost.

The accompanying drawings will serve to illustrate my invention, and in which similar letters of reference indicate like parts.

Figure 1 is a front view of the actuating 2o mechanism of the lamp. Fig. 2 is a side view.

In the drawings, A indicates the top plate or cover of the lamp. Depending from this cover is a supporting-tube B. Secured to the tube B, about midway, is a bracket C,

2 5 having two lateral arms C. The arms C are perforated at C and have a cavity C upon their upper surface.

D represents a pair of magnets. The mag nets are secured to a plate D, from the up- 0 per surface of which project two pins or uprights E. The pins E project through the openings C in the bracket C. On the ends of the pins E are washers E, secured by a transverse pin E Located between the washers E and the bottom of the cavities C in the bracket C are the helical springs F. The openings C in the bracket C are prefer ably somewhat larger in diameter than the pins E.

40 The object of mounting the magnets as described is to permit a certain mobility of the magnets relative to their support, and thereby do away with the objectionable humming sounds which are noticed in ordinary lamps when the magnets are rigidly fixed. Inclosing the tube B is a tubular sleeve G, capable of vertical movement upon the tube B. Rigidly connected to this tube at its lower end is a bracket H. This bracket has two arms,

the arm at the right, H, is carried upward and outward to the right and connected to the dash-pot I, which is adapted to move vertically over the dash-pot piston I, pivotally secured to the floor J of the lamp-case. The opposite arm, H is carried upward and outward to the left and is connected to the U- shaped armature K through a pin L and spring M. The pin L is secured to the armature and moves in an opening H in the arm H The spring M is located between the lower surface of the arm H and the bottom of the armature. H indicates the clutch mechanism. By this arrangement of mounting'for the armature free mobility is permitted between the armature and its support, thereby permitting the armature t0 aline itself with the magnets and irrespective of the vibration or slight alteration in position of the magnets under the influence of the current transmitted.

Connected to the bracket C, but projecting upward and rearwardly therefrom, is a bracket N, which carries a screw 0, which in turn carries a helical spring P, attached at its lower end to the arm H of the bracket H, which carries the dash-pot I. The spring I, which is adjustable through the screw 0, is intended to supplement the action of the dash-pot I.

When the lamp is in operation, the sleeve G is vertically moved up and down the tube B, as will be understood without further description.

Having thus described my invention, I claim-- 7 8 1. In an arc-lamp, in combination with the supporting-tube, abracket, apair of magnets,

a resilient support for the magnets carried by the bracket, a vertically-movable sleeve inclosing the supporting-tube, a dash-pot carried by the sleeve, an armature, and a resilient device interposed between the armature and the sleeve.

2. In an arc-lamp, in combination with the supporting-tube, a bracket provided with projecting arms, a resilient support for the magnets carried on one of the arms, a resilient retarding device for the dash-pot carried on the other arm, a vertically-movable .sleeve inclosing the supporting-tube, a dash-pot Ioo nected to one of said arms, an armature, and

a resilient device interposed between the op posite arm of said bracket and the said armature. I 5

In testimony whereof I affix my signature in the presence of two witnesses.

JOSEF HENRIK l-IALLBERG;

WVitnesses:

J. E. PEARSON, J. A. GAVANAGH. 

